Heavy Metal is not respected because of the bitter truth of Societal Situations; Fear, Death and Suffering presented to the listener in a calculable, protesting, distorting, gravitating and (most times) aggressive way. Generally, people believe in good intentions and will cast out (not support) Fear, Death and Suffering ideas to fit their choice (hence the dis-respect).

I respect heavy metal for confidently encouraging individuals to protest the need to acknowledge and include the shadow - the space to bring light.